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Mean Well NFM-05-3.3 Power Supply 5W 3.3V 1.25A
Overview
NFM-05-3.3 is the 3.3V output model of this series: rated current 1.25A, rated power 4.125W, typical efficiency 67%.
Features
- Universal AC input / Full range
- Protections: Short circuit / Overload / Over voltage / Over temperature
- Ultra-miniature size, light weight
- Cooling by free air convection
- Isolation classⅡ
- Medical safety approved (2 x MOPP between primary to secondary)
- No load power consumption<0.5W
- 100% full load burn-in test
- Fixed switching frequency at 67KHz
- High reliability
- Suitable for BF application with appropriate system consideration
- 3 years warranty
Specifications
OUTPUT
- DC VOLTAGE
- 3.3V
- RATED CURRENT
- 1.25A
- CURRENT RANGE
- 0 ~ 1.25A
- RATED POWER
- 4.125W
- RIPPLE & NOISE (max.)Note.2
- 80mVp-p
- VOLTAGE ADJ. RANGE
- 3 ~ 3.63V
- VOLTAGE TOLERANCENote.3
- ±2.0%
- LINE REGULATION
- ±1.0%
- LOAD REGULATION
- ±1.0%
- SETUP, RISE TIME
- 1000ms, 20ms/230VAC 1000ms, 20ms/115VAC at full load
- HOLD UP TIME (Typ.)
- 100ms/230VAC 24ms/115VAC at full load
INPUT
- VOLTAGE RANGE
- 85 ~ 264VAC 120 ~ 370VDC
- FREQUENCY RANGE
- 47 ~ 440Hz
- EFFICIENCY (Typ.)
- 67%
- AC CURRENT (Typ.)
- 0.12A/115VAC 0.08A/230VAC
- INRUSH CURRENT (Typ.)
- COLD START 25A/115VAC 45A/230VAC
- LEAKAGE CURRENTNote.6
- Touch current < 80μA/264VAC
PROTECTION
- OVERLOAD
- Above 105% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
- OVER VOLTAGE
- 3.8 ~ 4.95V Protection type : Shut off o/p voltage, clamping by zener diode
- OVER TEMPERATURENote.5
- Tj 145℃ typically (U1) detect on main control IC Protection type : Shut down o/p voltage, recovers automatically after temperature goes down
ENVIRONMENT
- WORKING TEMP.
- -20 ~ +70℃ (Refer to "Derating Curve")
- WORKING HUMIDITY
- 20 ~ 90% RH non-condensing
- STORAGE TEMP., HUMIDITY
- -40 ~ +85℃, 10 ~ 95% RH
- TEMP. COEFFICIENT
- ±0.03%/℃ (0 ~ 50℃)
- VIBRATION
- 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes
SAFETY & EMC (Note 4)
- SAFETY STANDARDS
- ANSI/AAMI ES60601-1,TUV EN60601-1, IEC60601-1, EAC TP TC 004 approved
- ISOLATION LEVEL
- Primary-Secondary: 2xMOPP
- WITHSTAND VOLTAGE
- I/P-O/P:4KVAC
- ISOLATION RESISTANCE
- I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
- EMC EMISSION
- Compliance to EN55011(CISPR11),EN55032 (CISPR32) Class B, EN61000-3-2,-3, EAC TP TC 020
- EMC IMMUNITY
- Compliance to EN61000-4-2,3,4,5,6,8,11, EN55035, EN60601-1-2, EN61204-3, medical level, EAC TP TC 020
OTHERS
- MTBF
- 738.7Khrs min. MIL-HDBK-217F (25℃)
- DIMENSION
- 58*45*19.1mm (L*W*H)
- PACKING
- 0.03Kg; 120pcs/5.0Kg/0.94CUFT
Test conditions and notes7
- 1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
- 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
- 3. Tolerance : includes set up tolerance, line regulation and load regulation.
- 4. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives.
- 5. The over temperature protection (OTP) is the built-in function of the control IC (U1). The activating level described above is based on the specification provided by the IC manufacturer.
- 6. Touch current was measured from primary input to DC output.
- 7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
Technical drawings
Downloads
FAQ
Can I use the NFM-05-3.3 for a 3.3V embedded controller or SBC?
This model provides 3.3V constant voltage at up to 1.25A, with 4.125W total output. That suits low-power embedded controllers, SBCs, and logic boards that need a regulated 3.3V rail within those limits.
Is the NFM-05-3.3 suitable for industrial communication or I/O electronics that run on 3.3V?
It can fit 3.3V communication, interface, or I/O electronics as long as the load stays at or below 1.25A and 4.125W. Its constant-voltage output makes it appropriate for equipment designed around a fixed 3.3V input.
Would this work for a compact 3.3V control board inside automation equipment?
Yes, for small 3.3V control or processing boards that do not exceed 1.25A. The compact 58 x 45 x 19.1 mm size also helps when the power section has limited internal space.
Can the NFM-05-3.3 be used where AC input standards vary by site?
The input range is 85-264VAC, which supports a wide AC input span. That makes it practical for 3.3V equipment deployed across installations using different mains voltages.
How does the NFM-05-3.3 compare with the rest of the NFM family?
The NFM-05 series includes NFM-05-3.3 at 4.125W, 3.3V, 1.25A; NFM-05-5 at 5W, 5V, 1A; NFM-05-12 at 5.04W, 12V, 0.42A; NFM-05-15 at 4.95W, 15V, 0.33A; and NFM-05-24 at 5.52W, 24V, 0.23A. Other series like NFM-10 and NFM-15 offer higher power ratings and currents.
Can the NFM-05-3.3 be used in indoor panels with temperature swings?
The specified operating range is -20°C to +70°C, so the unit is rated across that temperature span. No IP rating is listed in the provided specs, so enclosure sealing against dust or water is not specified.
Payment & Security
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Other NFM-05 Models
4 other models| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well NFM-05-5 Power Supply 5W 5V 1A | 5W | 5V | 1A | IP20 | $15.71 | View |
| Mean Well NFM-05-24 Power Supply 5W 24V 230mA | 5.52W | 24V | 0.23A | IP20 | $15.71 | View |
| Mean Well NFM-05-15 Power Supply 5W 15V 330mA | 4.95W | 15V | 0.33A | IP20 | $15.71 | View |
| Mean Well NFM-05-12 Power Supply 5W 12V 420mA | 5.04W | 12V | 0.42A | IP20 | $15.71 | View |
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